Ball mill



A. PERENY BALL MILL Filed Nov. 5, 1938 Patented Aug. 20, 1940 UNITEDSTATES PATENT OFFICE BALL MILL Andrew Pereny, Columbus, Ohio ApplicationNovember 5. 1938, Serial No. 239,111

1 Claim.

This invention relates to improvements in mills and pertainsparticularly to ball mills.

The primary object of the present invention is to provide a novel andimproved ball mill machine which isso designed that a number of barrelsmay be disposed one above the other to be rolled or tumbledsimultaneously and adapted to be individually removed from the machineor changed while the machine is in operation without disturbing ornecessitating the removal of any of the other barrels or jars in whichmaterial is being ground.

Another object of the invention is to provide an improved verticaltandem ball mill in which provision is made for increasing the number ofbarrel or jar rolling units, if desired, without increasing the floorspace required for the mill.

Still another object of the invention is to provide a ball mill machinein which novel means is employed for supporting grinding barrels or jarsfor rolling movement.

A still further object of the invention is to provide in a machine ofthe character described, a novel grinding jar structure. 5 The inventionwill be best understood from a consideration of the following detaileddescription taken in connection with the accompanying drawing formingpart of this specification, with the understanding, however, that theinventionv is not to be confined to any strict conformity with theshowing of the drawing but may be changed or modified so long as suchchanges or modifications mark no material departure from the salientfeatures of the invention as expressed in the appended claims.

In the drawing:

Fig. 1 is a view in front elevation of the mill embodying the presentinvention, a portion of the same being in section.

Fig. 2 is a view in side elevation of the mill.

Fig. 3 is a sectional view on the line 3-3 of Fig. 1. v

Fig. 4 is a sectional view through the mouth end of a grinding jar andthrough the, cap and securing means therefor.

Referring now more particularly to the-drawing, the base portion of themill structure will be seen from the drawing to consist of two pairs oflegs each indicated generally by the numeral I and each of these pairsof legs consists of the two vertical portions 2 connected at their upperends by the horizontal portion 3. Each vertical portion 2 has a foot 4which may be secured, if desired, to the underlying floor structure. Thelegs may be constructed of any suitable material such as angle ironmaterial or the like, and if made of angle iron, the legs will bearranged so that the portions 3 will have one flange extendingdownwardly and the other flange extending horizontally toward theopposite leg.

Secured to the horizontal portions 3 of the legs and connecting the legstogether, is a plate 5 to the underside of which a motor 6 is attached.The armature shaft of this motor extends laterally beyond one leg of themill, as indicated at l, m

and carries upon its end a pulley wheel 8.

Disposed upon and longitudinally of the top of the horizontal portion 3of each leg is a bearing unit consisting of two bars 9 placed one uponthe the other and having confronting bearing re- 15;

cesses lb which form bearing openings for trunnions ll extending fromthe ends of rollers I2.

Upon the side of the machine adjacent the motor pulley 8, a trunnion ofone of the rollers is extended to receive a double pulley l5. This 2double pulley has a belt [6 connecting it with the pulley 8 of the motorso that by operating the motor-6, rotary motion can be transmitted tothe roller with which the pulley H5 is connected.

Secured to each of the legs I and extending vertically therefrom is astandard I1. These standards are in the same plane transversely of themill and are secured together adjacent their upper ends by the tie rod18 which extends 30 through the sleeve l9 which is disposed between thestandards.

At spaced intervals lengthwise of each standard there is secured ahorizontal arm 20 which is perpendicular to the supporting standard and35 extends forwardly therefrom inthe Vertical plane of the underlyingleg I. Each of the arms 20 is in the same horizontal plane as an arm ofthe adjacent standard and each of these arms supports a bearing unitmade up of two plates 2| 40 disposed one upon the other and, like theplates or members 9 of the base supported unit, having opposing recesses22 which combine to form bearing openings for trunnions 23 extendingfrom the ends of rollers 24 which are of the same 5 construction as therollers l2. These rollers, like rollers 12, have a solid body portion l3and a sheath or covering of rubber which is indicated by the numeral Hi.There are thus provided at vertically spaced planes, pairs of spacedparallel 5o rollers and one roller of each of the pairs above the baserollers I2 has a trunnion extended to receive a double pulley 25. Belts26 connect the pulleys 25 and I5 together, as shown in Figs. 1 and 2, sothat the operation of the motor 6 will 55 produce rotary motion in aroller of each of the pairs.

The numeral 21 designates a barrel or jar which is preferably ofporcelain and. has one end reduced to form the neck 23 through which themouth opening 29 is formed, which opening is normally closed by thecover or lid 30. Formed upon the top of the lid is a rib 3! having acurved outer edge which at the end adjacent the center of the cover isnotched, as indicated at 32, to receive a bail 33 which is pivotallyattached to the neck 28 of the jar. This bail is oscillatable and isadapted to .be sprung over the rib 3! for frictional engagement in thenotch 32, as shown in Fig. 4.

In the operation of the present machine, the jars 21 are laid upon theirsides upon a pair of rollers, as shown in Fig. 1, after being chargedwith the material which is to be ground and with the usual balls orpebbles (not shown) which are employed in ball mills. When the motor 6is operated, rotary motion will be transmitted to one of the rollers ofeach pair and this motion will be then transmitted to each of the jarswhich will turn or roll in contact with the driven and the idler rollswhich support it. The whole mill will thus be driven by means of powerapplied to one roller, so that material within the jars'of the severalpairs of rollers will be tumbled or rolled with the grinding ballstherein against the walls of the jar to efiect the desired grinding andmixing of the material.

It will be readily apparent from the foregoing that the mill may be madeof one jar capacity or of any number up to six jars without requiringany more floor space than is necessary for a single jar. The capacity ofthe mill can be changed as required, by merely putting on longervertical standards H with additional arms and bearings. In other words,additions may be made as required, step by step, once the base is made.The present mill structure gives the simplest form of grinding withenough flexibility to increase capacity as need therefor may ariseWithout increasing floor space and the mill employs a minimum poweroutput because of the tandem arrangement of the units. It will also bereadily apparent that with the arrangement shown and described, any oneof the jars may be removed and replaced while the mill running, withoutinterfering with the grinding of material in the other jars.

What is claimed is:

A mill structure of the character described,

tally disposed plate and supporting legs therefor, a pair of bearingunits disposed upon the top of said first unit, each of said bearingunits being disposed at one side of the base unit and consisting ofelongated upper and lower superposed members extending from the front tothe rear of the base unit, an electric motor secured to the underside ofsaid plate and having an armature shaft projecting beyond one side ofthe base unit, a pair of rollers disposed in spaced parallel relationbetween said bearing units and each having an end trunnion disposedbetween the members of a bearing unit, one of said trunnions beingextended beyond the adjacent side of the base unit, a pulley upon theextended trunnion, a pulley upon said motor shaft, an operative couplingbetween said pulleys, a vertical standard disposed at each side of thebase unit at the rear thereof, a series of forwardly extending armscarried by each of said standards, a bearing unit extendinglongitudinally of each of said standard arms, a pair of rollers disposedin spaced parallel relation between each horizontally spaced pair ofarms and having end trunnions supported by the arm bearings, and anoperative coupling between said first trunnion supported pulley and aroller of each of the overlying pairs.

ANDREW PEREN Y.

.comprising a base unit consisting of a horizon-

